MPCC doesn't work with event dispatch period > 0 #471

Originally thought MPCC was not working at all after the final waypoint is saved while recording a Cable Cam. All messages after that point are buffered and don't appear to be sent back to a connected app, which prevents it from entering "play ready" state for the cable cam. This is true, but it does work if the event dispatch period is left at a value of 0. Otherwise the messages are buffered and not sent back to the connected app.